Boeing will have FAA approved fixes to the B-787 battery system completed by mid May. Ethiopian Airline will fly the first revenue flight Saturday, test flights resumed in April. Delivery of new aircraft will resume at the beginning of May.
The National Transportation Safety Board however remains unconvinced:
“So how do you go about designing a fix when you don’t know what the root cause is?” asked NTSB board member Earl Weener.
The NTSB seems especially concerned that the FAA outsourced testing of the system to Boeing itself.
The hearing was told the FAA relied largely on tests and analyses performed by the company and its partners, rather than independent government technical efforts. Hersman told reporters Tuesday that she hoped the hearings would help establish “what can be done in the future to prevent future incidents.”